Gasboy 70 Series Installation - Manual (Page 19)

MDE-4673 Consumer Electric Pumps Installation / Operation / Parts Manual · May 2007 Page 15
Troubleshooting Troubleshooting
Pump hums but does
not start. Is voltage adequate? Check voltage with the pump
on bypass, with the nozzle closed. Voltage cannot
be below 104 volts on a 115V pump; 204 volts on
a 230V pump. Replace motor if checks do not solve
the problem.
Is the Aux AC Control wire capped or connected to
a solenoid valve or fuel management system and
is the valve opening?
Check rotor, vanes, and bypass valve for free
operation. Check the motor with rotor and vanes
removed. The shaft should turn easily and
smoothly by hand. Spin the shaft by hand
clockwise, quickly start the motor (hand clear of
shaft) and observe the shaft. It should stop turning
in the clockwise direction and turn in a
counterclockwise direction. If it does not, replace
the motor. Rotor is springloaded! Take care after
the removal of the cover and the shaft
key that no parts are lost.
Pump runs but does
not prime or deliver
product. Is there gas in the tank? Fill up the tank.
Do you have a nozzle with the anti-drain valve
removed? (You must be able to blow air through
the nozzle in the direction the fuel flows through it,
when the nozzle handle is held open). Recommend use of the part number
038519 for unleaded and 038520 for
diesel.
Loosen the pump cover and slide aside so you can
observe the rotor and vane movement inside the
pump cavity. Rotor should be turning freely in a
counter-clockwise direction. If rotor turns in the
clockwise direction, it is bad. Replace motor, if bad.
If register is recording but no product is being
dispensed, you may have a supply line air leak. Correct supply line leak.
Pump runs but does
not prime or deliver
product. Check for an air leak on the suction side of the
pump. Is the check valve seated properly? Reassemble and prime the pump
using liberal quantity of motor oil in the
pump cavity. If it primes, run the pump
full flow and snap nozzle closed; shut
off motor and check for leak on suction
side of pump above check valve. Any
observed liquid leakage would indicate
an air leak when pump is running with
nozzle open and would prevent
priming when the pump was empty.
Are bypass, strainer, and check valve cover plates
flat? They could be bent from excessive pressure
created by a vehicle running over the hose.
Is there an air leak in the suction line below check
valve. Perform the accuracy check using 5
gallon Seraphim Test can. Any clock
fast error (see Inaccurate Delivery) in
excess of 2- 1/2% indicates an air leak
in the suction line. The most common
source of an air leak in the suction line
is the union. Check the union for
alignment and tightness before
checking balance of suction line. If the
pump does not prime using oil, suction
line is blocked or has a severe air leak.
Pump delivers product
but does not register. Is the main totalizer recording? If yes, problem is
in the register assembly. Ensure that the lever on
the side of the register is returning back to the
record position. Repair/replace lever.
If the main totalizer is not working, the problem is a
broken or jammed measuring chamber. Replace.
Symptom Checks Corrective Action